namespace WxAgent.Core;

public static class WechatTextInput
{
    public static string Prepare(string text)
    {
        if (string.IsNullOrWhiteSpace(text))
            throw new WxAgentException(WxAgentErrorCode.InvalidArgument, "Message text must not be empty.");
        var normalized = text.ReplaceLineEndings("\n");
        if (normalized.Length > 4000 || normalized.Any(character => char.IsControl(character) && character is not ('\n' or '\t')))
            throw new WxAgentException(WxAgentErrorCode.InvalidArgument, "Message text must not exceed 4000 characters or contain unsupported control characters.");
        return normalized;
    }
}